package com.cloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.cloud.config.ApplicationContextConfig;
import com.cloud.entity.CommonResult;
import com.cloud.entity.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * <h3>springcloud02</h3>
 * <p></p>
 *
 * @author : zhengyue
 * @date : 2020-06-29 22:14
 **/
@RestController
@Slf4j
public class CicleBreakerController {
    public static final String  SERVICE_URL = "http://nacos-payment-provider";

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping("consumer/fallback/{id}")
//    @SentinelResource(value = "fallback") //没有配置
//    @SentinelResource(value = "fallback", fallback = "handlerFallback") //fallback只负责业务异常
//    @SentinelResource(value = "fallback", blockHandler = "blockHandler") //blockHandler只负责sentinel控制台配置违规
//    @SentinelResource(value = "fallback", fallback = "handlerFallback", blockHandler = "blockHandler")
    @SentinelResource(value = "fallback", fallback = "handlerFallback",
            blockHandler = "blockHandler", exceptionsToIgnore = {IllegalArgumentException.class})
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);

        if(id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException，非法参数异常...");
        } else if(result.getData() == null) {
            throw new NullPointerException("NullPointerException，该ID没有对应记录，空指针异常");
        }
        return result;
    }

//    fallback
    public CommonResult handlerFallback(@PathVariable Long id, Throwable e) {
        Payment payment = new Payment(id, "null");
        return new CommonResult(444, "兜底异常HandleFallback，exception内容" + e.getMessage(), payment);
    }

//    blockHandler
    public CommonResult blockHandler(@PathVariable Long id, BlockException blockException) {
        Payment payment = new Payment(id, "null");
        return new CommonResult(445, "blockException限流，无此流水：blockException：" + blockException.getMessage(), payment);
    }


}
